How to Add an Account to Google Authenticator You need two things: Google's authenticator app and a code from the account you want to add to the app (Facebook, Amazon, your bank, etc.).

Up until now, your Google Authenticator entries were tied to your phone's hardware, meaning you lost them if you lost your phone. No more!

How to take a backup of Google Authenticator Google Authenticator keeps your account safe with a time-based one-time password (TOTP). It stores the codes in the cloud for easy access.

Google Authenticator now syncs one-time codes with your account, so you're not stuck if you lose your device.

What is the security vulnerability in Google’s 2FA? In short, the network traffic used to sync the secrets in Google Authenticator is not end-to-end encrypted.